Page replacement algorithms. For the same reference string s…

Page replacement algorithms. For the same reference string shown in the previous question (Q XX), and for the same number of frames (3), run the Second Chance Algorithm, showing the content of the frames as well as their R bits at each reference. Indicate at each reference if a page fault happened by indicating Y/N “PF”. Hint: linearizing the presentation of your answer will be easier in Canvas. So just follow this format of a “vertical” answer: 2 F1: x, R: 0 or 1 F2: x, R: 0 or 1 F3: x, R: 0 or 1 PF: No or Yes   3 F1: x, R: 0 or 1 F2: x, R: 0 or 1 F3: x, R: 0 or 1 PF: No or Yes

Pthread Barriers. Barrier in POSIX threads are very useful i…

Pthread Barriers. Barrier in POSIX threads are very useful in synchronizing phases of operation of an application. A barrier is set using pthread_barrier_init() which specifies a count. Unless and until “count” number of processes come to the barrier point and wait on the barrier by calling pthread_barrier_wait(), the barrier is not overcome. Can we use pthread barriers to implement a quorum consensus (that is to reach or not reach a majority of consensus or agreement in a finite time)? For instance, 3 out of 5 processes could form a quorum if they agree (join) even if the two other processes do not or did not yet agree (did not join as yet). Give a Yes/No answer.